Re: Bad system call (core dumped)

From: David Xu <davidxu_at_freebsd.org>
Date: Tue, 14 Feb 2006 13:44:13 +0800
Joseph Koshy wrote:
> bd>    800 xchat    CALL  ksem_init(0xbfbfd40c,0x1)
> bd>    800 xchat    RET   ksem_init -1 errno 78 Function not implemented
> bd>    800 xchat    PSIG  SIGSYS SIG_DFL
> bd>    800 xchat    NAMI  "xchat.core"
> 
> bd> Like, I have no some "ksem_init" function in my.... kernel or something?
> 
> dx> You should include "options  P1003_1B_SEMAPHORES" in kernel config
> dx> file, I don't know why such a basic is not in GENERIC.
> 
> sys/conf/NOTES marks it as being 'very experimental'.
> 
> There are three calls to ksem_init() in our library code.   Userland code
> should be checking for kernel support for features before attempting to
> use them.
> 
> --
> FreeBSD Volunteer,     http://people.freebsd.org/~jkoshy
> 
> 
I don't think user code should check it before it can be used,
actually, it is being used by thread libraries to implement named
semaphore, it is requred by POSIX.

David Xu
Received on Tue Feb 14 2006 - 04:44:15 UTC

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